package com.cn.wanxi.servlet.user;

import com.alibaba.fastjson.JSONObject;
import com.cn.wanxi.model.ResultModel;
import com.cn.wanxi.model.UserModel;
import com.cn.wanxi.service.UserService;
import com.cn.wanxi.service.impl.UserServiceImpl;
import com.cn.wanxi.util.Tool;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/back/user/findById")
public class UserFIndByIdServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //      0.乱码处理
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");
        //        1.取得页面数据
        String id = req.getParameter("id");


        //       2. 封装对象
        UserModel userModel = new UserModel();
        userModel.setId(Tool.strToInt(id));

//        3.调用服务逻辑层
        UserService userService = new UserServiceImpl();
//       4. 必须要给前端一个返回值,统一的格式
        ResultModel resultModel = userService.findById(userModel);
//        5.返回前端
        resp.getWriter().println(JSONObject.toJSONString(resultModel));
//        以后无论是Java和web或者其他语言和web都是用json格式进行转换
//        所以我们需要将Java对象转换为json格式


    }
}
